Attachment for punching and shearing machines.



A. PARPI TT. ATTACHMENT FOR PUNGHING AND SHEARING MACHINES.

Patented Apr. 30, 1912.

3 SHEETSSHEET 1 34m; onto c APPLIOATION FILED JULY 24, 1908. 1 ,O25,01 6.

wi lwwooao A. PARFIT-T.

ATTACHMENT FOR PUNGHING AND SHEARING MACHINES.

APPLICATION IILED JULY 24, 1908.

1,025,016. Patented Apr. 30, 1912.

' a SHEETS-SHEET 2.

A. PARFITT.

ATTACHMENT FOR PUNGHING AND SHEARING MACHINES.

APPLICATION FILED JULY 24, 1908.

1,025,016. Patented Apr.'3 0, 1912.

' v 51 55 F1 .6. i? /ltg -*'O I I L 75 74 75 i Z? 79 19- V a ALFRED ra'nmtrr, or woman, kansas.

ATTACHMENT FOR PUNGHINQ AND SHEARING MACHINES.

' Specification of Letters latent.

Patented Apr. 30, 1912.

Application filed July 24, 1908. Serial No. 445,190.

To an whom it may concern:

Be .it known that I, ALFRED PARFITT, citizen of the United States, residing at T0- peka, in the county of Shawnee and State of Kansas, have invented a new and useful Attachment for Punchin Machines, of which the fol owing 1s a specification.

In -machine shops where punch ng and shearing is done, a .vertical machine for the purpose is ordinarily employed, but for certain classes of work, as for instance, where the flanges of plates are to be punched, these machines cannot be conveniently used. Therefore is becomes necessary to employ a horizontal punch, which is an expensive machine, and one that occupies a comparatively great amount of space, or the work 1s done by hand so that it is laborious and expensive.

The primary object of the present invention is to provide a novel, simple and comparatively cheap attachmentwhich can be readily applied to or detached from practically any type of punching or shearing machine, and will convert the same into a machine of the angularly disposed type, thus if attached to a vertical punch, it will form a horizontal punch or vice versa.

A further and important object is to provide an attachment that will occupy very little additional space, and will permit the 7 sheets or plates to be handled by cranes or in any other manner desired.

Several embodiments of the invention are illustrated in the accompanying drawings,

wherein- Figure 1 is a side elevation of the vertical punching and shearing machine, showing the attachment in place thereon. Fig. 2 is a detail view on an enlarged scale and partially in section of the attachment as aplied. Fig. 3 is a horizontal sectional view. ig. 4 is an end elevation. Figs. 5-9 inclusive are detail partial sectional views of modified forms of construction. v

Similar reference characters designate corresponding parts in all the figures of the drawings. 1

-In the embodiment illustrated in Figs. 1-4 inclusive, a vertical punching or shearing machine is disclosed, comprising a .frame 10 having a recessed work-receivmg seat 11, the lower wall 12 thereof constituting a support for the die of the machine. Operating in the upper portion of the seat 11 is the usual vertical plunger 13, to which the and Shearing punch .or other tool is ordinarily attached. The machine may be of any well known type, and therefore needs no particular dcscri-ption as the structure is well known to those skilled in the art.

The attachment comprises a base 14 that is arranged to rest upon the die support 12 and has oppositely outstanding flanges 15 provided with bolt holes 16 that aline with the bolt holes 17 of the support 12. Bolts 18,-passing through the alincd bolt holes,

serve to secure the base in place. The inner or rear end of the base is' preferably provided with an upstanding enlargement 19, and threaded thereinto, is a tension bolt 20 having a many-sided head 21 at its upper end, which head is tapered, as shown at 22, and arranged to engage the top wall of the work receiving seat .11. The base 14 projects-beyond the frame 10 of the machine, and is provided with an enlarged head 23 having a recessed vertical work-receiving seat 24. The outer wall of this seat carries a suitable die 25, and operating through the inner wall, is a horizontally disposed reciprocatory plunger 26 having a holder 27 of any suitable character for the reception of a punch 28. The rear portion of the head is provided with cars 29, between which a bell crank 30 is pivoted. This bell crank has a depending arm 31, which is connected to the rear end of thev plunger 26 by a link 32. Said bell crank furthermore has a rearwardly extending arm 33 connected by a link 34 with an actuating member or device 35, which member is provided with a stem 36that engages in the socket of the plunger 13. With this construction, it will be evident that when the base is'mounted on the die support of a punching and shearing machine, the actuating member 35 will be engaged by'the plunger 13 so as to be operated thereby. Consequentl if the punching and shearing machine is t rown into operation,

the plunger 26 will be operated, and the punch moved in a horizontal direction.

formed into a horizontal punch.-

The attachment is a simple one'and can a machine, an

' but little space.

. 60. Said bell crank also has a horizonta In order to indicate how the structure may be altered, attention is invited to Figs. 5-9 inclusive. 7

In Fig. 5, a base 37 is bolted, as shown at 38 to a machine in the ordinary manner and has a head 39 provided with a vertical workreceiving seat 40. The plunger 41 has connected to its rear end a link 42, and the rear end of said link has a head 43 operating against the inclined bearing surface 44. Pivoted to this link is another link 4A: that is also pivoted to an actuating devic 45 arranged to engage the plunger 46 of the machine when the attachment is in place on said machine.

In Fig. 6, the base 47 is bolted as shown at 48 to the machine, and has a head 49 provided with a work-receiving seat 50. The plunger 51 has connected to its rear end a toggle 52, which is also pivoted as shown at 53 to the rear end of the base. Connected to the toggle links by a link 53 is an actuating device 54.- adapted to be engaged with the lunger of the machine.

A still different form of device is shown in Fig. 7. In this embodiment of the invention, the base 58 is bolted in the usual manner to the bed late of the machine, and has a head 59 in which operates a plunger 60. A bell crank 61 is pivotally mounted, as shown at 62, in a socket 63 in the base. This bell crank has an upstanding arm 64, which is connected by a link 65 with the plungier y disposed arm 66 to the free end of which is attached a vertically operating link 66 that is pivoted to an actuating device 67 adapted to be engaged with the plunger of the machine.

A base 69 is employed in Fig. 8, which is bolted, as shownat 70 to the bed of a machine, and has a head 71 provided with a work-receiving seat 72. The usual horizontally reciprocating plunger 73 is employed, and connected to its rear end by a link '74, is an eccentric strap 75 surrounding an eccentric 76 journaled, as shown at 77 on the head. This eccentric has a rearwardly, extending arm 78 connected by a link 7 9 with the actuating device 80, which device is adapted to be engaged in the usual manner with the plunger of the machine.

' A still simpler form of construction is shown in Fig. 9. In this embodiment, the

base is designated 81, and is bolted to the machine in the ordinary manner. It has an outstanding head'82 provided with a workreceiving seat 83, in the rear of which oper-' ates a horizontal plunger 84. Theredr end ofthis plunger is disposed in spaced relation side of the seat, means 85, and operating between and said rear end of the attached to to a bearing wall said bearing wall plunger is a wedge 86, which is the plunger 87 of the machine. Itwill be evident that all these devices have the same advantages as the first described embodiment, though saidfirst described form of construction is probably preferable, and has proven entirely satisfactory in use.

From the foregoing, it is thought that the construction, operation, and many advantages of the herein described invention will be apparent to those skilled in the art without-furtherdescription, and it will be understood that various changes in the size,

.shape, proportiomand minor details of con struction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. For instance, while the attachment has been shown as applied to a vertical punching and shearing machine, it will be evident that it may be as readily applied to a horizontal machine to convert the same into a verticalmachine.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is l 1. In an attachment of the character set forth, the combination with a base having an outstanding head provided with a. recessed work-receiving seat, of a die member located on one side of the seat, a plunger slidably mounted on the head on the opposite side of the seat, an actuating device connected to the plunger, said base fitting into the recessed work-receiving seat of a punch ing and shearing machine, and means for. securing the base to said punching and shearing machine in place of the die block of said machine, said means including atension bolt adjustably mounted on the base and engaging the upper wall of the seat.

2. In an attachment of the character set forth, the combination with a base having a head at one end provided with a work-receiving seat, of a die mounted on the head on one side of the seatand a reciprocatory plunger mounted on the head on the other for securing the base in the recessed work-receiving seat of a punchingand shearing machine, said means including bolts that pass through the bolt holes of said machine, and a tension bolt threaded into the base and having a head that bears against the up er side of the seat.

In testimony, that I c aim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

ALFRED PARFITT.

Witnesses: i W. A. Runny,

G. H. Panrrrr. 

